1,775 research outputs found
The Brightest Cluster Galaxy in Abell 85: The Largest Core Known so far
We have found that the brightest cluster galaxy (BCG) in Abell~85, Holm 15A,
displays the largest core so far known. Its cusp radius, kpc (), is more than 18 times
larger than the mean for BCGs, and kpc larger than A2261-BCG, hitherto
the largest-cored BCG (Postman, Lauer, Donahue, et al. 2012) Holm 15A hosts the
luminous amorphous radio source 0039-095B and has the optical signature of a
LINER. Scaling laws indicate that this core could host a supermassive black
hole (SMBH) of mass . We
suggest that cores this large represent a relatively short phase in the
evolution of BCGs, whereas the masses of their associated SBMH might be set by
initial conditions.Comment: 14 pages, 3 figure, 2 tables, accepted for publication in ApJ Letters
on October 6th, 2014, replacement of previous manuscript submitted on May
30th, 2014 to astro-p
Hatching and survival from Conch “tote” Pomacea flagellata under laboratory conditions in Tabasco, Mexico [Poster abstract]
Preliminary study of the culture of the Conch “tote” Pomacea flagellata in Tabasco, México [Poster abstract]
Investigation of ULF magnetic anomaly during Izu earthquake swarm and Miyakejima volcano eruption at summer 2000, Japan
International audienceResults of the ULF electromagnetic emission during the Izu, 2000 earthquake (EQ) swarm and Miyake volcano eruptions during the summer period of 2000 are presented and analyzed. The analysis of the obtained data has been performed in 3 main directions: traditional statistical analysis, i.e. analysis of time dynamics of spectral density, polarization ratios and their derivatives, Principal Component Analysis, and Fractal Analysis. The statistical characteristics were studied at different frequency sub-bands in a frequency range 10-3-0.3 Hz. These methods of data processing are described and the obtained results are illustrated and discussed. Some peculiarities of the obtained results such as the rise of the second principal component and the rise of the fractal index can be interpreted as possible short-time precursors
Effect of disorder on the vortex-lattice melting transition
We use a three dimensional stacked triangular network of Josephson junctions
as a model for the study of vortex structure in the mixed state of high Tc
superconductors. We show that the addition of disorder destroys the first order
melting transition occurring for clean samples. The melting transition splits
in two different (continuous) transitions, ocurring at temperatures Ti and Tp
(>Ti). At Ti the perpendicular-to-field superconductivity is lost, and at Tp
the parallel-to-field superconductivity is lost. These results agree well with
recent experiments in YBaCuO.Comment: 4 pages + 2 figure
Upgrade of the edge Charge Exchange Recombination Spectroscopy system at the High Field Side of ASDEX Upgrade
The upgrade of the high field side (HFS) edge charge exchange recombination spectroscopy (CXRS) system of ASDEX Upgrade is presented. This diagnostic provides temperature, rotation and radiance measurements of impurity species by taking advantage of the gas puff based CXRS technique (GP-CXRS). The system is formed by a fast piezoelectric valve, that injects thermal neutrals into the plasma, and two optical heads. The localized gas injection together with properly aligned lines of sights (LOS) lead to a high spatial resolution of 5–19 mm. Fast gas puff modulation allows a precise subtraction of the passive part of the signal. The existing poloidal optical head has been replaced with a new one to increase the radial resolution. The number of lines of sight (LOS) of the poloidal optical head has been increased from 8 to 16 covering around 7 cm of the plasma edge at the HFS. The same radial range is also viewed by a toroidal optical head. The neutral deposition, needed to calculate the impurity density profile, has been modelled using the FIDASIM code. A realistic gas puff geometry has been implemented in the code. The first measurements of impurity temperature, rotation and radiance utilizing the upgraded diagnostic are presented.Universidad de Sevilla PPITUS 2017EUROfusion Consortium 633053H2020 Marie-Skłodowska Curie programme (Grant No. 708257)Spanish Ministry of Economy and Competitiveness (Grant No. FJCI-201422139
Oncologist’s knowledge and implementation of guidelines for breakthrough cancer pain in Spain: CONOCE study
[Purpose]: Breakthrough cancer pain (BTcP) has been shown to be a prevalent and poor prognostic factor for oncologic patients, which remain under diagnosed and undertreated. In 2012, the Spanish Society of Medical Oncology (SEOM) published a clinical practice guideline (CPG) for the treatment of cancer pain which specifically addressed the management of BTcP.[Methods]: Fundación ECO designed a qualitative study using an Internet-based survey to investigate the attitudes toward, compliance with, and use of SEOM Guideline.[Results]: A total of 83 oncologists with a mean experience of 13 years responded. Overall, 82% were aware of different guidelines to manage BTcP. Notably, attitudes toward guidelines were highly positive and there was nearly unanimous agreement that CPG provided the best scientific evidence available (99%), on the minimum information to be gathered for the medical history (100%), on the need for a specific treatment for BTcP (100%), and fentanyl as the first-choice drug (99%). Interestingly, there were discrepancies between what oncologists agreed with and what they do in clinical practice. In fact, 87.6% declare full compliance with SEOM guideline, although adherence to registration of BTcP data in medical records ranged from 30.1 to 91.6% (mean 64.5%); therapeutic management compliance was higher ranging from 75.9 to 91.6%. Main barriers identified were time pressure together with vague statements and limited dissemination of the guidelines.[Conclusion]: Despite oncologist’s clinical practice is increasingly guided by GPC, it suffers from limited compliance, at least in part due to suboptimal statements. Improved dissemination and education are needed to enhance guideline implementation.This study was funded by Kyowa Kirin Farmacéutica S. L.U. through Fundación ECO
Efecto de la densidad en la sobrevivencia de juveniles del caracol “tote” Pomacea flagellata bajo condiciones de laboratorio en Tabasco, México
Vortex structure and resistive transitions in high-Tc superconductors
The nature of the resistive transition for a current applied parallel to the
magnetic field in high-Tc materials is investigated by numerical simulation on
the three dimensional Josephson junction array model. It is shown by using
finite size scaling that for samples with disorder the critical temperature Tp
for the c axis resistivity corresponds to a percolation phase transition of
vortex lines perpendicularly to the applied field. The value of Tp is higher
than the critical temperature for j perpendicular to H, but decreases with the
thickness of the sample and with anisotropy. We predict that critical behavior
around Tp should reflect in experimentally accessible quantities, as the I-V
curves.Comment: 8 pages + 6 figure
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